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http://dx.doi.org/10.4334/JKCI.2006.18.5.579

The Estimation and Comparison of Flexural Crack Width Considering Bonding Characteristics in Reinforced Concrete Members  

Ko, Won-Jun (Dept. of Civil and Environmental Engineering, Induk Institute of Technology)
Min, Byung-Chul (Dept. of Civil and Environmental Engineering, Induk Institute of Technology)
Park, Sun-Kyu (Dept. of Civil and Environmental Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korea Concrete Institute / v.18, no.5, 2006 , pp. 579-588 More about this Journal
Abstract
In recent years, the availability of high-strength reinforcing and prestressing steels leads us to build economically and efficiently designed concrete structural members. One of critical problems faced to the structural engineers dealing with these types of structural member is controls of crack width that is used as a criterion for the serviceability in the limit state design. Especially, flexural cracking must be controlled to secure the structural safety and to improve the durability as well as serviceability of the load carving members. The proposed method utilizes the results of pure tension test in which tensile loads are applied both side of specimen, done by Ikki. The bond characteristics of deformed reinforcing bar under pure tension is considered by the area of concrete and rib area. The results of proposed method are compared with the test data and the results show that the proposed method can take into account the dimensions, variation of sectional properties, and direction of reinforcing and gives more accurate maximum bond stress and corresponding relative slip than the existing methods. the characteristics of bonding is considered by using dimensionless slip magnitude and effective reinforcement ratio. The validity of the proposed equation is verified by test experimental data.
Keywords
axial load; bonding; bond stress; reinforcement; slip;
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